Results 11 to 20 of about 291 (173)

Climate Change and African Agricultural Resilience: A 10-Year Comprehensive Review of Adaptive Capacity, Policy, and Environmental Stewardship. [PDF]

Plant Environ Interact
ABSTRACT In the current era, climate change has emerged as a fundamental threat to African agriculture, driven by increasingly erratic climatic patterns such as prolonged rainfall, decadal droughts, and escalating thermal stress. This review evaluates contemporary agricultural productivity by gathering and analyzing empirical data from academic ...
Okonkwo CO, Mawcha KT, Changwa R, Ndolo D, Babalola OO.   +4 more
europepmc   +2 more sources

Instruments and Methods: A novel method for obtaining very large ancient air samples from ablating glacial ice for analyses of methane radiocarbon [PDF]

We present techniques for obtaining large (∼100 L STP) samples of ancient air for analysis of ¹⁴C of methane (¹⁴CH₄) and other trace constituents. Paleoatmospheric ¹⁴CH₄ measurements should constrain the fossil fraction of past methane budgets, as well ...
Weiss, Ray F., Petrenko, Vasilii V., Lowe, Dave, Harth, Christina M., Schaefer, Hinrich, Brook, Edward J., Reeh, Niels, Smith, Andrew M., Severinghaus, Jeffrey P., Muhle, Jens, Headly, Melissa   +10 more
core   +6 more sources

The Autonomous Pinger Unit of the Acoustic Navigation Network in EnEx-RANGE: an autonomous in-ice melting probe with acoustic instrumentation

Annals of Glaciology, 2021
The Autonomous Pinger Unit (APU) is an electro-thermal drill with acoustic instrumentation developed for the project EnEx-RANGE in view of a future space mission for the sub-surface exploration of Saturn's moon Enceladus.
Lars Steffen Weinstock, Simon Zierke, Dmitry Eliseev, Peter Linder, Cornelius Vollbrecht, Dirk Heinen, Christopher Wiebusch   +6 more
doaj   +1 more source

The BEAMISH hot water drill system and its use on the Rutford Ice Stream, Antarctica

Annals of Glaciology, 2021
During the 2018/19 Antarctic field season, the British Antarctic Survey (BAS) Basal conditions on Rutford Ice Stream: BEd Access, Monitoring and Ice Sheet History’ (BEAMISH) project drilled three holes through the Rutford Ice Stream, West Antarctica.
Paul G. D. Anker, Keith Makinson, Keith W. Nicholls, Andrew M. Smith   +3 more
doaj   +1 more source

Characterising englacial R-channels using artificial moulins

Journal of Glaciology, 2022
The englacial and subglacial drainage systems exert key controls on glacier dynamics. However, due to their inaccessibility, they are still only poorly understood and more detailed observations are important, particularly to validate and tune physical ...
Annegret Pohle, Mauro A. Werder, Dominik Gräff, Daniel Farinotti   +3 more
doaj   +1 more source

Determining the evolution of an alpine glacier drainage system by solving inverse problems

Journal of Glaciology, 2021
Our understanding of the subglacial drainage system has improved markedly over the last decades due to field observations and numerical modelling. However, integrating data into increasingly complex numerical models remain challenging.
Inigo Irarrazaval, Mauro A. Werder, Matthias Huss, Frederic Herman, Gregoire Mariethoz   +4 more
doaj   +1 more source

Sedimentological characterization of Antarctic moraines using UAVs and Structure-from-Motion photogrammetry [PDF]

, 2015
In glacial environments particle-size analysis of moraines provides insights into clast origin, transport history, depositional mechanism and processes of reworking.
Westoby, Matt, Sugden, David, Dunning, Stuart, Woodward, John, Winter, Kate, Hein, Andrew, Marrero, Shasta, Hein, Andrew; id_orcid   +7 more
core   +2 more sources

A novel approach to process brittle ice for continuous flow analysis of stable water isotopes

Journal of Glaciology, 2018
Brittle ice, which occurs in all intermediate-depth and deep ice cores retrieved from high-latitude regions, presents a challenge for high-resolution measurements of water isotopes, gases, ions and other quantities conducted with continuous flow analysis
REBECCA L. PYNE, ELIZABETH D. KELLER, SILVIA CANESSA, NANCY A. N. BERTLER, ALEX R. PYNE, DARCY MANDENO, PAUL VALLELONGA, STEFANIE SEMPER, HELLE A. KJÆR, ED HUTCHINSON, W. TROY BAISDEN   +10 more
doaj   +1 more source

Antarctic subglacial drilling rig: Part III. Drilling auxiliaries and environmental measures

Annals of Glaciology, 2021
The Antarctic subglacial drilling rig (ASDR) is designed to recover 105 mm-diameter ice cores up to 1400 m depth and 41.5 mm-diameter bedrock cores up to 2 m in length. In order to ensure safe and convenient drilling, drilling auxiliaries are designed to
Xiaopeng Fan, Pavel Talalay, Youhong Sun, Xingchen Li, Nan Zhang, Alexey Markov, Yang Yang, Pinlu Cao, Rusheng Wang, Yongwen Liu, Yunchen Liu, Ting Wang, Wei Wu, Cheng Yang, Jialin Hong, Da Gong, Han Zhang, Mikhail Sysoev, Xiao Li, An Liu, Yazhou Li   +20 more
doaj   +1 more source

New synthetic fiber armored cable for freezing-in thermal ice probes

Annals of Glaciology, 2021
A series of new synthetic armored cables were developed and tested to ensure that they were suitable for use with the RECoverable Autonomous Sonde (RECAS), which is a newly designed freezing-in thermal ice probe.
Nan Zhang, Hui Liu, Pavel Talalay, Youhong Sun, Na Li, Xiaopeng Fan, Bing Li, Da Gong, Jialin Hong, Ting Wang, An Liu, Yazhou Li, Yunchen Liu, Rusheng Wang, Yang Yang, Liang Wang   +15 more
doaj   +1 more source